Thermodynamics questions
1906 published questions with worked solutions.
- Decomposition of MgCO_3 occurs only on heating. A positive change in enthalpy occurs in
- The standard heat of formation of sodium ions in aqueous solution from the following data will be: Heat of solution NaOH(aq.)...
- The enthalpies of formation of organic substances can be conveniently determined from
- Heat energy change during the chemical reaction, CO+ 12O_2 CO_2, is known as
- The enthalpy change for the reaction NaOH(aq)+HCl(aq) NaCl(aq)+H_2O(l) is -57 kJ. Predict the value of the enthalpy change in the...
- Hess's law is related to
- The heat change for the reaction, H_2O(l) H_2O(g), is called
- C_p for: N_2(g)+3H_2(g) 2NH_3(g) is
- The value of H^ for the reaction Cu^+(g)+I^-(g) CuI(g) is -446 kJ mol^ -1 . If the ionisation energy of Cu(g) is 745 kJ mol^ -1 ,...
- The correct thermochemical equation is
- The bond energies of H-H, Br-Br and H-Br are 433, 192 and 364 kJ mol^ -1 respectively. The H^ for the reaction H_2(g)+Br_2(g)...
- H_f of graphite is 0.23 kJ/mol and H_f of diamond is 1.896 kJ/mole. H_ transition from graphite to diamond is
- If C(s)+O_2(g) CO_2(g), H=-393.5 kJ, and CO(g)+ 12O_2(g) CO_2(g), H=-283.5 kJ, then the heat of formation of CO is
- The enthalpy of formation of water from hydrogen and oxygen is -286 kJ mol^ -1 . The enthalpy of decomposition of water into...
- Hess's law of constant heat summation is an application of
- The H_ ionisation ^ for HCN and CH_3COOH are 45.2 and 2.1 kJ mol^ -1 . Which of the following is correct?
- The exchange of heat energy during a chemical reaction at constant temperature and pressure occurs in the form of
- When ammonium chloride is dissolved in water, the solution becomes cold. The change is
- From the following bond energies: H-H bond energy: 431.37 kJ mol^ -1 , C=C bond energy: 606.10 kJ mol^ -1 , C-C bond energy:...
- The enthalpy of formation of H_2O(l) is given by
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